Find next number of the following series. 5, 7, 13, 39, 177, ?

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13 Sep 2022 Sequence & Series

Find next number of the following series.
5, 7, 13, 39, 177, ?

OPtion

1) 3199
2) 2047
3) 1399
4) 1039
5) 1216
6) 1047
7) 2039
8) 913
9) 862
10) None of these

Solution

Series is formed by sequential multiplication by 2, 3, 4, 5, ... and subtraction of 3, 8, 13, 18, ....
5 x 2 - 3 = 7
7 x 3 - 8 = 13
13 x 4 - 13 = 39
39 x 5 - 18 = 177
177 x 6 - 23 = 1039
Correct Option 4)

Correct Option: 4 Best Solution (1)